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Tesla CP_a054

Charge port latch not engaged Fully insert charge cable or check for obstruction

Common search variants: CPa054 · CP-a054 · CP a054 · Search ignores case and common separators.

DriveNot yet established by verified evidence.
ChargeYes, AC charging is limited to 16 A if the latch is not engaged. DC fast charging/Supercharging is not available.
ServiceNot yet established by verified evidence.
Confidence95%

Quick answer

Tesla alert CP_a054 means the charge-port latch cannot latch the charge cable in the charge-port inlet. Fully insert the cable and check for an obstruction. If the latch remains disengaged, AC charging is limited to 16 A and DC fast charging/Supercharging is not available.

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1. What does CP_a054 mean?

Tesla alert CP_a054 means the charge-port latch cannot latch the charge cable in the charge-port inlet. Fully insert the cable and check for an obstruction. If the latch remains disengaged, AC charging is limited to 16 A and DC fast charging/Supercharging is not available.

2. Technical explanation

Verified Tesla owner-manual evidence states that CP_a054 is triggered when the charge-port latch is unable to latch the charge cable in the charge-port inlet. The alert message directs the driver to fully insert the charge cable or check for an obstruction. A latch that is not engaged limits AC charging, including use of a Mobile Connector or Wall Connector, to 16 A; DC fast charging/Supercharging is unavailable.

3. What system is affected?

Charge-port latch and charge-port inlet.

4. How serious is this code?

Not yet established by verified evidence.

5. Symptoms you may notice

  • CP_a054 alert: “Charge port latch not engaged — Fully insert charge cable or check for obstruction.”
  • AC charging may be limited to 16 A.
  • DC fast charging/Supercharging is not available while the latch is not engaged.

6. Possible causes

  • The charge cable is not fully inserted.
  • An obstruction prevents the charge-port latch from latching the cable.
  • Not yet established by verified evidence: any further mechanical, electrical, or software cause.

7. Can I still drive the vehicle?

Not yet established by verified evidence.

8. Can I charge the vehicle?

Yes, AC charging is limited to 16 A if the latch is not engaged. DC fast charging/Supercharging is not available.

9. What you can safely do

  • Fully insert the charge cable.
  • Check for an obstruction that prevents the charge-port latch from engaging.
  • Do not attempt high-voltage or charge-port disassembly.

10. Step-by-step troubleshooting

  1. Fully insert the cable into the charge-port inlet.
  2. Check whether an obstruction is preventing the latch from engaging.
  3. If CP_a054 remains present after these actions, further troubleshooting is not yet established by verified evidence.

11. When to contact service

Not yet established by verified evidence.

12. What the service center may check

  • Not yet established by verified evidence.

13. Possible repair or resolution

  • Not yet established by verified evidence.

14. Affected vehicles

15. Related TSBs / service bulletins

  • NHTSA manufacturer communications/owner-manual publications document CP_a054 and its meaning. Verified examples include NHTSA document 10253666 (published March 27, 2024) and document 10250484 (published December 1, 2023). The supplied evidence does not establish a repair TSB for this alert.

16. Recall information

  • Not yet established by verified evidence.

17. Official manufacturer information

Official NHTSA-hosted Tesla owner-manual evidence: https://static.nhtsa.gov/odi/tsbs/2024/MC-10253666-9999.pdf

19. Frequently asked questions

What does Tesla CP_a054 mean?

The charge-port latch is unable to latch the charge cable in the charge-port inlet.

Can I still charge with CP_a054?

Verified evidence states AC charging is limited to 16 A when the latch is not engaged. DC fast charging/Supercharging is not available.

What should I do first?

Fully insert the charge cable and check for an obstruction, as directed by the alert.

Is it safe to drive?

Not yet established by verified evidence.

20. Sources & verification

Accepted ResearchVerified
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Tesla CP_a054: Charge port latch not engaged Fully insert charge cable… | EV Diagnostics